class_docstr: Graph isomorphism block.
code: def call(self, inputs):
      x = self._graph_iso_layer(inputs)
      x = self._activation(x)
      return self._dropout(x)
  
imports: from layers import GraphAttnLayer
  from layers import GraphConvLayer
  from layers import GraphIsomorphismLayer
  from layers import SparseGraphAttnLayer
  import tensorflow
label_desc: Use image node_id 2 for calling the GINBlock obj's underlying member method code with example usage: obj.call(inputs) and returns: self